This 2 pack Samsung RAM module has a total capacity of 4GB, with a capacity of 4GB per module. It is a DDR3 SDRAM type with a bus speed of PC3-10600 (DDR3-1333). The number of modules is 1, and it has 204 pins. This SO-DIMM form factor RAM module is compatible with a variety of devices and can greatly improve your computer's performance. This product is perfect for anyone who needs to upgrade their computer's memory. The item is in excellent working order and has been thoroughly tested.